Results 11 to 20 of about 1,253 (211)
“Barchan” dunes in the lab [PDF]
Comptes Rendus. Mécanique, 2002 We demonstrate the feasibility of studying dunes in a laboratory experiment. It is shown that an initial sand pile, under a wind flow carrying sand, flattens and gets a shape recalling barchan dunes. An evolution law is proposed for the profile and the summit of the dune. The dune dynamics is shown to be shape invariant.
Dauchot, Olivier +3 more
openaire +6 more sources
Birth of a subaqueous barchan dune [PDF]
Physical Review E, 2017 Barchan dunes are crescentic shape dunes with horns pointing downstream. The present paper reports the formation of subaqueous barchan dunes from initially conical heaps in a rectangular channel. Because the most unique feature of a barchan dune is its horns, we associate the timescale for the appearance of horns to the formation of a barchan dune.
Zambrano, Carlos Azael Alvarez +1 more
openaire +5 more sources
The relationship between barchan size and barchan morphology: a case study from Northern Namibia [PDF]
South African Geographical Journal, 2021 Landform allometry has been a topic of inquiry since at least the 1970s. In this study, the presence of allometry is investigated for a barchan dunefield in northern Namibia.
Van der Merwe, Barend Jacobus
openaire +3 more sources
On the crescentic shape of barchan dunes [PDF]
The European Physical Journal B - Condensed Matter, 2004 Aeolian sand dunes originate from wind flow and sand bed interactions. According to wind properties and sand availability, they can adopt different shapes, ranging from huge motion-less star dunes to small and mobile barchan dunes. The latter are crescentic and emerge under a unidirectional wind, with a low sand supply.
P. Hersen, Hersen, P.
openaire +4 more sources
EPJ Web of Conferences, 2017 We show that the orientation and morphology of bedforms occurring on top of Pluto’s smooth ice coats are consistent with an aeolian origin under conditions of unidirectional flow.
Parteli Eric J. R., Pöschel Thorsten
doaj +2 more sources
Strong-wind events control barchan dune migration
Communications Earth & EnvironmentWind is the most important external force in shaping aeolian landforms. Yet, it remains unclear what role the strong-wind events will play in the development of aeolian landforms compared with the effect of regular winds.
Hongjing Ren +5 more
doaj +3 more sources
Experimental data on barchan-barchan interaction at the grain scale
, 2021 This is part of the data concerning experiments on barchan-barchan interaction at the grain scale. Here, you find images of all patterns described as well as images of diffusion behavior. Due to the size of files, images during mass exchange process were
Righi Assis, W (via Mendeley Data) +1 more
core +2 more sources
Analysis of Barchan morphology in the west of Loot desert using morphometric features [PDF]
کاوشهای جغرافیایی مناطق بیابانی, 2018 In this article, we analyzed the morphology of barchans (crescentic sand dunes) using morphometric features of seven components of this landform in the west of the Loot desert near Pashoeyeh village. The components were height, width, length of the right
Mehran Maghsoudi +4 more
doaj +1 more source
Remote Sensing, 2021 La Banya spit, located at the south of the River Ebro Delta, is a sandy formation, developed by annexation of bars forming successive beach ridges, which are oriented and modeled by the eastern and southern waves.
Inmaculada Rodríguez-Santalla +9 more
doaj +1 more source
Analysis of sand dunes to determine wind direction and detect sand source sites (case study: Khartooran Erg, Iran) [PDF]
Desert, 2007 Wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. Regarding the importance of wind effects on sand dunes especially in Iran, in this study, Khartooran Erg was analyzed to ...
N. Mashhadi +4 more
doaj +1 more source